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PdhGetLogFileSize

関数

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DLLpdh.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

// pdh.dll
#include <windows.h>

DWORD PdhGetLogFileSize(
    PDH_HLOG hLog,
    LONGLONG* llSize
);

パラメーター

名前	型	方向
hLog	PDH_HLOG	in
llSize	LONGLONG*	out

戻り値の型: DWORD

各言語での呼び出し定義

// pdh.dll
#include <windows.h>

DWORD PdhGetLogFileSize(
    PDH_HLOG hLog,
    LONGLONG* llSize
);

[DllImport("pdh.dll", ExactSpelling = true)]
static extern uint PdhGetLogFileSize(
    IntPtr hLog,   // PDH_HLOG
    out long llSize   // LONGLONG* out
);

<DllImport("pdh.dll", ExactSpelling:=True)>
Public Shared Function PdhGetLogFileSize(
    hLog As IntPtr,   ' PDH_HLOG
    <Out> ByRef llSize As Long   ' LONGLONG* out
) As UInteger
End Function

' hLog : PDH_HLOG
' llSize : LONGLONG* out
Declare PtrSafe Function PdhGetLogFileSize Lib "pdh" ( _
    ByVal hLog As LongPtr, _
    ByRef llSize As LongLong) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PdhGetLogFileSize = ctypes.windll.pdh.PdhGetLogFileSize
PdhGetLogFileSize.restype = wintypes.DWORD
PdhGetLogFileSize.argtypes = [
    wintypes.HANDLE,  # hLog : PDH_HLOG
    ctypes.POINTER(ctypes.c_longlong),  # llSize : LONGLONG* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhGetLogFileSize = Fiddle::Function.new(
  lib['PdhGetLogFileSize'],
  [
    Fiddle::TYPE_VOIDP,  # hLog : PDH_HLOG
    Fiddle::TYPE_VOIDP,  # llSize : LONGLONG* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "pdh")]
extern "system" {
    fn PdhGetLogFileSize(
        hLog: *mut core::ffi::c_void,  // PDH_HLOG
        llSize: *mut i64  // LONGLONG* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll")]
public static extern uint PdhGetLogFileSize(IntPtr hLog, out long llSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhGetLogFileSize' -Namespace Win32 -PassThru
# $api::PdhGetLogFileSize(hLog, llSize)

#uselib "pdh.dll"
#func global PdhGetLogFileSize "PdhGetLogFileSize" sptr, sptr
; PdhGetLogFileSize hLog, varptr(llSize)   ; 戻り値は stat
; hLog : PDH_HLOG -> "sptr"
; llSize : LONGLONG* out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

出力引数:

#uselib "pdh.dll"
#cfunc global PdhGetLogFileSize "PdhGetLogFileSize" sptr, var
; res = PdhGetLogFileSize(hLog, llSize)
; hLog : PDH_HLOG -> "sptr"
; llSize : LONGLONG* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "pdh.dll"
#cfunc global PdhGetLogFileSize "PdhGetLogFileSize" sptr, sptr
; res = PdhGetLogFileSize(hLog, varptr(llSize))
; hLog : PDH_HLOG -> "sptr"
; llSize : LONGLONG* out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; DWORD PdhGetLogFileSize(PDH_HLOG hLog, LONGLONG* llSize)
#uselib "pdh.dll"
#cfunc global PdhGetLogFileSize "PdhGetLogFileSize" intptr, var
; res = PdhGetLogFileSize(hLog, llSize)
; hLog : PDH_HLOG -> "intptr"
; llSize : LONGLONG* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; DWORD PdhGetLogFileSize(PDH_HLOG hLog, LONGLONG* llSize)
#uselib "pdh.dll"
#cfunc global PdhGetLogFileSize "PdhGetLogFileSize" intptr, intptr
; res = PdhGetLogFileSize(hLog, varptr(llSize))
; hLog : PDH_HLOG -> "intptr"
; llSize : LONGLONG* out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	pdh = windows.NewLazySystemDLL("pdh.dll")
	procPdhGetLogFileSize = pdh.NewProc("PdhGetLogFileSize")
)

// hLog (PDH_HLOG), llSize (LONGLONG* out)
r1, _, err := procPdhGetLogFileSize.Call(
	uintptr(hLog),
	uintptr(llSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhGetLogFileSize(
  hLog: THandle;   // PDH_HLOG
  llSize: Pointer   // LONGLONG* out
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhGetLogFileSize';

result := DllCall("pdh\PdhGetLogFileSize"
    , "Ptr", hLog   ; PDH_HLOG
    , "Ptr", llSize   ; LONGLONG* out
    , "UInt")   ; return: DWORD

●PdhGetLogFileSize(hLog, llSize) = DLL("pdh.dll", "dword PdhGetLogFileSize(void*, void*)")
# 呼び出し: PdhGetLogFileSize(hLog, llSize)
# hLog : PDH_HLOG -> "void*"
# llSize : LONGLONG* out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。